Question

2. Green Coffee at Village Center sells 12-oz regular coffee to go for $2.75. The manager of the store believes the standard deviation of the serving amount is 0.6 ounces. Customers complained they have been getting less for the last several weeks. The following week, the manager of Green Coffee randomly checked the amount of ’12-oz regular coffee to go’. The manager checked total 45 cups and found the mean amount was 11.8 ounces. Conduct a hypothesis test with a 5% level of significance, and suggest whether the manager should improve his operation. (All calculations to 3 decimal places.) Hint: Alpha = the level of significance

Answer 1